OpenCV 教材 - eiichiromomma/CVMLAB GitHub Wiki
(OpenCV) 教材
各濃度でその値を記載した画像。 cvThresholdの練習用。
結構適当
#グレースケール
import numpy as np
import cv2
xpos = 10 + np.linspace(0, 560, 16, dtype=np.uint16)
ypos = 20 + np.linspace(0, 320, 16, dtype=np.uint16)
src = np.zeros((350, 610), dtype=np.uint8)
for r in range(16):
for c in range(16):
src = cv2.putText(src, str(c+r*16), (xpos[c], ypos[r]), cv2.FONT_HERSHEY_PLAIN,
1, c+r*16, 1, cv2.LINE_8)
cv2.imshow('test', src)
cv2.waitKey(0)
cv2.imwrite('numImg.png', src)カラー
#カラー
import numpy as np
import cv2
xpos = 10 + np.linspace(0, 560, 16, dtype=np.uint16)
ypos = 20 + np.linspace(0, 320, 16, dtype=np.uint16)
src = np.zeros((350*2, 610*2,3), dtype=np.uint8)
for r in range(16):
for c in range(16):
src = cv2.putText(src, str(c+r*16), (xpos[c], ypos[r]),
cv2.FONT_HERSHEY_PLAIN,1, (c+r*16,c+r*16,c+r*16), 1, cv2.LINE_8)
for r in range(16):
for c in range(16):
src = cv2.putText(src, str(c+r*16), (610+xpos[c], ypos[r]),
cv2.FONT_HERSHEY_PLAIN,1, (c+r*16,0,0), 1, cv2.LINE_8)
for r in range(16):
for c in range(16):
src = cv2.putText(src, str(c+r*16), (xpos[c], 350+ypos[r]),
cv2.FONT_HERSHEY_PLAIN,1, (0,c+r*16,0), 1, cv2.LINE_8)
for r in range(16):
for c in range(16):
src = cv2.putText(src, str(c+r*16), (610+xpos[c], 350+ypos[r]),
cv2.FONT_HERSHEY_PLAIN,1, (0,0,c+r*16), 1, cv2.LINE_8)
cv2.imshow('test', src)
cv2.waitKey(0)
cv2.imwrite('numImg_c.png', src) #include <cv.h>
#include <highgui.h>
#include <stdlib.h>
enum{
IM_HEIGHT=330,
IM_WIDTH=580,
CHR_STEP_X=35,
CHR_STEP_Y=20,
ORG_X=10,
ORG_Y=20
};
int main(void)
{
#if 0 //1:グレー、0:カラー
IplImage *src = cvCreateImage(cvSize(IM_WIDTH, IM_HEIGHT),IPL_DEPTH_8U, 1);
cvSetZero(src);
CvFont font;
char c_num[4];
int i;
cvInitFont(&font, 1, 1.0, 1.0);
for (i=0; i<256; i++){
_itoa_s(i,c_num,4,10);
cvPutText(src,c_num,cvPoint(ORG_X+(i%16)*CHR_STEP_X, ORG_Y+((i)/16)*CHR_STEP_Y),&font, cvScalar(i));
}
cvNamedWindow("src",CV_WINDOW_AUTOSIZE);
cvShowImage("src",src);
cvWaitKey(0);
cvSaveImage("numImg.png)",src);
return 0;
#else
IplImage *src = cvCreateImage(cvSize(IM_WIDTH*2, IM_HEIGHT*2),IPL_DEPTH_8U, 3);
cvSetZero(src);
CvFont font;
char c_num[4];
int i,c;
cvInitFont(&font, 1, 1.0, 1.0);
for (c=0; c<4; c++){
for (i=0; i<256; i++){
_itoa_s(i,c_num,4,10);
cvPutText(src,c_num,cvPoint(ORG_X+(i%16)*CHR_STEP_X+IM_WIDTH*(c%2), ORG_Y+((i)/16)*CHR_STEP_Y+IM_HEIGHT*(c/2)),
&font, cvScalar((c==0||c==3)?i:0,(c==1||c==3)?i:0,(c==2||c==3)?i:0));
}
}
cvNamedWindow("src",CV_WINDOW_AUTOSIZE);
cvShowImage("src",src);
cvWaitKey(0);
cvSaveImage("numImg_c.png)",src);
return 0;
#endif
}